create project from sources: ignore *.java files under node_modules directory (IDEA-150380)

java/idea-ui/src/com/intellij/ide/util/projectWizard/importSources/JavaSourceRootDetector.java

@@ -33,6 +33,10 @@ public abstract class JavaSourceRootDetector extends ProjectStructureDetector {
   @Override
   public DirectoryProcessingResult detectRoots(@NotNull File dir, @NotNull File[] children, @NotNull File base,
                                                @NotNull List<DetectedProjectRoot> result) {
+    if (dir.getName().equals("node_modules")) {
+      return DirectoryProcessingResult.SKIP_CHILDREN;
+    }
+
     final String fileExtension = getFileExtension();
     for (File child : children) {
       if (child.isFile() && FileUtilRt.extensionEquals(child.getName(), fileExtension)) {